Literal AtomicString construction can rely on strlen optimization.

third_party/WebKit/Source/core/html/shadow/MediaControls.cpp

 /*
  * Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011, 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 110 matching lines @@
     , m_isPausedForScrubbing(false)
     , m_panelWidthChangedTimer(this, &MediaControls::panelWidthChangedTimerFired)
     , m_panelWidth(0)
     , m_allowHiddenVolumeControls(RuntimeEnabledFeatures::newMediaPlaybackUiEnabled())
 {
 }
 
 PassRefPtrWillBeRawPtr<MediaControls> MediaControls::create(HTMLMediaElement& mediaElement)
 {
     RefPtrWillBeRawPtr<MediaControls> controls = adoptRefWillBeNoop(new MediaControls(mediaElement));
-    controls->setShadowPseudoId(AtomicString("-webkit-media-controls", AtomicString::ConstructFromLiteral));
+    controls->setShadowPseudoId(AtomicString("-webkit-media-controls"));
     controls->initializeControls();
     return controls.release();
 }
 
 // The media controls DOM structure looks like:
 //
 // MediaControls                                       (-webkit-media-controls)
 // +-MediaControlOverlayEnclosureElement               (-webkit-media-controls-overlay-enclosure)
 // | +-MediaControlOverlayPlayButtonElement            (-webkit-media-controls-overlay-play-button)
 // | | {if mediaControlsOverlayPlayButtonEnabled}
@@ skipping 609 matching lines @@
     visitor->trace(m_toggleClosedCaptionsButton);
     visitor->trace(m_fullScreenButton);
     visitor->trace(m_durationDisplay);
     visitor->trace(m_enclosure);
     visitor->trace(m_castButton);
     visitor->trace(m_overlayCastButton);
     HTMLDivElement::trace(visitor);
 }
 
 } // namespace blink